<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			function text (){
				var sum = 100;
				function a(){
					sum++;
				}
				a();
				function b(){
					sum--;
				}
				b();
				return sum;
				
			}
			var falg = text();
			console.log(falg);
		</script>
	</head>
	<body>
	</body>
</html>
